Maths: 遇到的JJ很少, 大概7题。
1) x>y?
(1)-x>-y
(2)x^2<y^2
ANSWER:A (1)x<y (2)x=3,y=4 x<y;但x=3,y=-4 x>y
2) n is even? (B)
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)-x>-y
(2)x^2<y^2
ANSWER:A (1)x<y (2)x=3,y=4 x<y;但x=3,y=-4 x>y
2) n is even? (B)
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)-x>-y
(2)x^2<y^2
ANSWER:A (1)x<y (2)x=3,y=4 x<y;但x=3,y=-4 x>y
2) n is even? (B)
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)-x>-y
(2)x^2<y^2
ANSWER:A (1)x<y (2)x=3,y=4 x<y;但x=3,y=-4 x>y
2) n is even? (B)
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
(1)n+n =even (2)n*n =even
3) a,b,c,d all positive,a+c > b+d? (1)a>b
(2)c <d
4)比较大小:2^80,4^50,6^20 ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
(1)a>b
(2)c <d
4)比较大小:2^80,4^50,6^20 ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
(1)a>b
(2)c <d
4)比较大小:2^80,4^50,6^20 ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
(1)a>b
(2)c <d
4)比较大小:2^80,4^50,6^20 ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20
ANSWER: 2^80=2^60*2^20; 4^50= 2^(2*50)=2^100= 2^80 * 2^20;
6^20= (2.4)^40=2.4^20 * 2.4^2
ANSWER:4^50 》2^80 》6^20